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The promotional effect of Cr on catalytic activity of Pt/ZSM-35 for H2-SCR in excess oxygen

Paper ID Volume ID Publish Year Pages File Format Full-Text
50867 46819 2010 5 PDF Available
Title
The promotional effect of Cr on catalytic activity of Pt/ZSM-35 for H2-SCR in excess oxygen
Abstract

Selective catalytic reduction of NO by hydrogen was studied over Cr modified Pt/ZSM-35 catalysts. The preparation process greatly influenced catalytic activity and sample prepared by co-impregnation method exhibits the best activity. In situ DRIFT studies revealed that on Pt–Cr/ZSM-35, (1) new Pt-NOδ+ and NO species adsorbed on Pt were detected upon NO + O2 adsorption; (2) much more ammonia species were formed under reaction condition. Cr addition not only enhanced the adsorption of NOx but also promoted the formation of surface NH4+ species, which should be the origin of promotional effect of Cr on Pt/ZSM-35 for H2-SCR reaction.

Keywords
Chromium; Pt/ZSM-35; H2-SCR; NH4+
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The promotional effect of Cr on catalytic activity of Pt/ZSM-35 for H2-SCR in excess oxygen
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 11, Issue 11, 10 June 2010, Pages 955–959
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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